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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Introduction and Snapshot of Dual Nature of Radiation and Matter - Study ref# 836
Introduction: The Maxwell’s equations of electromagnetism and Hertz experiments on the generation and detection of electromagnetic waves in 1887 strongly established the wave nature of light. Towards the same period at the end of 19th ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Introduction and Snapshot of Dual Nature of Radiation and Matter - Study ref# 837
Following sections must be covered to understand the Dual Nature of Radiation: 1. Introduction 2. Electron Emission 3. Photoelectric Effect 4. Experimental Study of Photoelectric Effect 5. Photoelectric Effect and Wave Theory ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Target Setup for Dual Nature of Radiation and Matter - Study ref# 838
Student requires to achieve the following milestones to get better grip over Dual Nature of Radiation And Matter. The milestones / targets are as follows: Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Tes...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10682
Name the phenomenon which shows the quantum nature of electromagnetic radiation. Answer: Photoelectric effect (Raman/Compton effect)...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10683
State one factor which determines the intensity of light in the photon nature of light Answer: Number of photons emitted per second determines the intensity of light in the photon nature of light....
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10684
State one reason to explain why wave theory of light does not support photoelectric effect. Answer: According to wave theory same intensity of different light colours should have same energy but experiment shows that energy depends upon freq...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10685
Define intensity of radiation on the basis of photon nature of light. Write its S.I. unit. Answer: The amount of light energy/photon energy, incident per metre square per second is called intensity of radiation. S.I unit:
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10686
In photoelectric effect, why should the photoelectric current increase as the intensity as the intensity of monochromatic radiation incident on a photosensitive surface is increased? Explain. Answer: Increase in intensity of the incident ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10687
Draw graphs showing variation of photoelectric current with applied voltage for two identical radiations of equal frequency and different intensities. Mark the graph for the radiations of higher intensity Answer: ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10688
Write Einstein’s photoelectric equation. Explain the terms (i) threshold frequency and (ii) stopping potential. Answer: (i) Einstein’s photoelectric equation, K.E. of photoelectron = Incident energy of photons – Work function ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10689
Write three basic properties of photons which are used to obtain Einstein’s photoelectric equation. Use this equation to draw a plot of maximum kinetic energy of the electrons emitted versus the frequency of incident radiation. Answer: Three...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10690
Find the frequency of light which ejects electrons from a metal surface, fully stopped by a retarding potential of 3.3 V. If photo electric emission begins in the metal at a frequency of , calculate the work function (in eV) for this metal....
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10691
Two monochromatic radiations of frequencies and (and) and having the same intensity are, in turn, incident on a photosensitive surface to cause photoelectric emission. Explain, giving reason, in which case (i) more number of electron...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10692
Plot a graph showing the variation of stopping potential with the frequency of incident radiation for two different photosensitive material having work function
and ( >). On what fac...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10693
X-rays fall on a photosensitive surface to cause photoelectric emission. Assuming that the work function of the surface can be neglected, find the relation between the de-Broglie wavelength () of the electrons emitted to the energy (
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10694
(a) In a photoelectric effect, do all the electrons that absorb a photon come out as photoelectrons irrespective of their location? Explain (b) A source of light, of frequency greater than the threshold frequency, is placed at a distance‘...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10695
The following graph shows the variation of photocurrent for a photosensitive metal: (i) Identify the variable X on the horizontal axis. (ii) What does the point A of the horizontal axis represent? ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10696
A particle is dropped from a height H. The de-Broglie wavelength of the particle as a function of height is proportional to (a) H. (b)
. (c)
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10697
Consider the given figure. Suppose the voltage applied to A is increased. The diffracted beam will have the maximum at a value of that (a) Will be larger than the earlier value (b) Will be the same as the earlier value (c) Will be less...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10698
A proton, a neutron, an electron and an -particle have same energy. Then, their de-Broglie wavelengths compare as (a)
(b)
(c)
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10699
An electron (mass m) with an initial velocity is in an electric field. If its de-Broglie wavelength at time t is given by (a)
(b)
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10700
Draw a plot showing the variation of de-Broglie wavelength of electron as a function of its K.E. Answer: ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10701
Find the ratio of de-Broglie wavelengths associated with two electrons accelerated through 25 V and 36 V. Answer:
De-Broglie wavelength of an electron ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10702
An
particle and a proton are accelerated through the same potential. Find the ratio of their de-Broglie wavelengths. Answer: De-Broglie wavelengths is given by ...
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NEET - Grade 12 - Physics - Dual Nature of Radiation and Matter - Study ref# 10703
Draw a graph showing the variation of de-Broglie wavelength of a particle of charge q and mass m, with the accelerating potential V. An particle and a proton have the same de-Broglie wavelength equal to 1. Explain with calculations, w...
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